9.1 Coordinating the Plane
9.2 Distance Between Two Points
9.3 The Midpoint of a Line Segment
9.4 The Slope of a Line
9.5 The Equation of a Line
9.6 The Equation y=mx+c
9.7 Lines Perpendicular and Parallel to a Given Line l
9.8 Graphing Lines
9.9 Intersection of Two Lines
9.10 Area of a Triangle
Test Yourself 9
